PLZ I need an answer

In the final round of trivia competition, contestants were asked to name as many states that begin with the letter m as they could in 15 seconds. the bar graph shows the number of states the contestants were able to name. how many contestants participated in the final round of the competition?

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m